CVE-2026-41205

HIGH

Mako: Path traversal via double-slash URI prefix in TemplateLookup

Title source: cna

Description

Mako is a template library written in Python. Prior to 1.3.11, TemplateLookup.get_template() is vulnerable to path traversal when a URI starts with // (e.g., //../../../secret.txt). The root cause is an inconsistency between two slash-stripping implementations. Any file readable by the process can be returned as rendered template content when an application passes untrusted input directly to TemplateLookup.get_template(). This vulnerability is fixed in 1.3.11.

References (3)

Core 3

Core References

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https://github.com/sqlalchemy/mako/security/advisories/GHSA-v92g-xgxw-vvmm

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https://github.com/sqlalchemy/mako/commit/e05ac61989a7fb9dd7dcde6cfd72dc48328719a3

View Writeup ZIP pw:eip

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https://github.com/sqlalchemy/mako/releases/tag/rel_1_3_11

Scores

CVSS v3 7.5

EPSS 0.0036

EPSS Percentile 27.8%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-22

Status published

Products (2)

pypi/Mako 0 - 1.3.11PyPI

sqlalchemy/mako < 1.3.11 (2 CPE variants)

Published Apr 23, 2026

Tracked Since Apr 24, 2026